Ingot-mold.



G. A. DORNIN.

INGOT MOLD.

APPLICATION FILED AUG-3. ma.

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2 geowfge jar aim Patented Apr. 24, 1917.

2 SHEETS-SHEET I.

.YGIA. DORNIN.

INGOT MOLD.

APPLICATION FILED AUG.3. 1916. 7 1,223,?75., Patented Apr. 24,1917.

2 ETSSHEEI 2.

" Ego GEORGE A. DORNIN, 0F BALTIMORE, MARYLAND.

' ING-OT-MOLD.

' Specification of Letters Patent.

Patented Apr. 24, 191%.

Application filed August3, 1916. Serial No. 113,002.

To all whom it may concern: I

Be it known that I, GEORGE A. DORNIN, a citizen of the United States,residing in Baltimore, Maryland, have invented certain new and usefulImprovements in Ingot- Molds, of which the following is a specification.

This invention relates to improvements in the construction of ingotmolds and especially to that class of such molds in which the largerpart of the mold is uppermost. Molds of this kind are generally open attop and bottom, the bottom being closed while casting either by means ofa stool on which the mold rests and which is some times provided with ashort projection which enters the opening in the bottom of the mold, orby what is known-as a stripping plug which serves the double purpose ofclosing the bottom opening and of also detachmg; the ingot from the moldat the com-,

mencement of the stripping operation.

The object of my present invention is to efficiently seal thebottomportion of the mold chamber in such manner as to prevent theescape of metal therefrom and to do this in a most simple way.

I have demonstrated that the bottom opening of the mold may beefficiently sealed by a plate of sheet metal where such plate isproperly supported in the mold cavity above the bottom opening of themold. In such casethe leakage of molten metal around "the edges of theplate is quite small and ordinarily is insuilicient to be material, butin order to prevent any leakage I sometimes interpose refractory sealingmaterial between the plate and the stool or directly between the plateand that portion of the mold walls which support it. The plate which Iemploy serves the purpose of sealing the bottom opening of the mold andit also covers the mold stool and. therefore prevents the molten metalfrom sticking to the stool and where .rerractory material is employed itprevents such material from coming into direct contact with the ingotand reduces to a miniinum the passage of steam or gases from therefractory material to the ingot.

In the accompanying drawings,

Figure 1 is a plan view of an ingot mold ith my improvements applied.

Fig. 2 shows a vertical central section t ereof on the line 2-2 of Fig.1.

Fig. 2 is a detail view in vertical section showing a modification.

Figs. 3, and 4 are detail views in vertical section each showing aslightly modified form of the invention.

Fig. 5 is a view similar to Fig. 3 showing a further modification inwhich refractory material is placed in the bottom opening of the moldbetween the stool and the plate.

Fig. 6 is a view similar to Fig. 5 but showing how a stripping plug maybe arranged in the bottom opening of the mold.

Fig. 7 is a perspective view of one of the plates employed.

Fig. 8 is'a perspective view of a strip of sheet metal from which theindividual plates are cut.

The mold A shown in Figs. 1 and 2 has a cavity larger in diameter at topthan at bottom and it is formed with a necked-in portion a and a bottomopening a. There is a rounded portion a surrounding the bottom openingof the mold in order to avoid the presence of sharp angular projections.The bottom opening a is preferably made circular, as shown, and the moldrests on a stool B in the usual way. A sealing plate C, which ispreferably made rectangular in outline and which'is of larger area thanthe bottom opening a, completely covers said opening. Said plate issupported near its edges by the lower portion of the walls of the moldcavity and it is possible to so form or finish the supporting portionsof the mold walls and to so support the plate as to practically preventthe leakage of molten metal, or the passage thereof onto the stool andout between the stool and the bottom of the mold in such manner as toform fins. Preferably the lower portion of the walls of the mold cavityare recessed, as indicated at 0: forming a ledge a on which the platerests. This recess a is rectangular in outline corresponding in shape tothat of the sealing plate. In such construction, when the moldis-teemed, the molten metal covers the sealing plate and such metal ascomes in contact with the necked-in portion of the mold is directedupwardly and the formation in the mold walls of recesses with reentrantangles is prevente The plate prevents the molten metal rom striking themold stool or from filling the bottom opening and sticking to the stooland it also, as before stated, prevents the leakage of wise passupwardly into molten metal through the opening in such manner as to formlateral fins. When the mold is stripped the sealing plate adheres to theingot and is removed from the mold therewith.

While, as before stated, there'is little leakage in a construction suchas shown in Figs. 1 and 2,1 may, as indicated in Fig. 2, interposebetween the ledge (11* and the plate refractory sealing material a Itwill be observed that this material does not surround the edges of theplate but lies beneath the plate, therefore very little if any of suchmaterial comes in contact with the. bottom of the ingot and there islittle, if any, formation of steam or gases w the molten metal. lhereare many ways in which my invention may be embodied. Some of these areillustrated in other figures of the drawing.

In Fig. 3, instead of forming the neckedin portion, as indicated in Fig.2, the mold cavity merely tapers downwardly and is formed at b with aflat ledge surrounding the bottom opening a of the mold. Sealingmaterial I) may be introduced between this ledge and sealing plate.

lln Fig. t the mold cavity has ed lower portion provided with a portiona surrounding the of the mold and on this portion the sealing plate issupported, refractory material 0 being preferably interposed between thepart c and the plate C.

ln hi 5 the mold cavity is formed with a necke -in portion a and with aledge a similar to that shown in Fig. 2. The plate C is supported on theledge 00 and sealing material a may be interposed between the plate andthe ledge but in this instance refractory sealing material l) is placedin the bottom opening of the mold on the stool ll. Should any metal leakunder the sealing plate it will be prevented by the material D fromassing outwardly between the stool and the ottom of the mold in suchmanner as to form fins. Where the sealing material D is thus used it isgenerally not necessary to use a seal such as a if it be desired toemploy a stripping plug to raise the ingot in the mold preliminary toits being stripped therefrom, 1' preferably employ a construction suchas shown in Fig.

a roundflattened bottom opening "6. ln this case the stool B is termedwith an opening at and the bottom opening oi oi? the mold is suitablshaped to receive the stripping plug E. he mold cavity is necked-in ata: as before and it is formed with a ledge a similar to that beforedescribed. The plate (1 rests on this ledge and between the plate andthe plug is interposed sealing ma.- terial 6 There is no sealingmaterial around the edges of the plate, but such material is disposedwholly below the plate and does not come in contact with the ingot.

hich would other' Any molten metal which by chance should find its wayaround the edges of the plate is arrested by the sealing material.Therefore the wedging or cramming of the plug in the mold is entirelyprevented.

I am aware that in a tion filed by Mr. Emil Gathmann, an ingot mold isshown, described and claimed, in which the mold cavity is necked-in atthe bottom and is provided with a rounded portion between he necked-inpart of the mold and the bottom opening thereof. Such application alsoshows a sealing or stripping plug in the bottom opening and a sealingplate which closes the bottom opening of the mold and rests on the moldwalls just above the bottom opening. 1 do not, therefore, claim suchsubject matter in my application.

I claim as my invention:

It. An ingot mold having a bottom opening, a sealing plate of largerarea than the bottom opening of the mold covering the same and supportedby the walls of the lower portion of the mold cavity above the bottomopening, and refractory sealing material interposed between the plateand those portions of the mold walls which support it.

2.. An ingot mold having a bottom opening, a stool on which the mold issupported, a sealing plate of larger 'area than the bottom opening ofthe mold covering the same and supported by the walls of the lowerportion of the mold cavity above the bottom opening, and refractorysealing material interposed between the stool and the plate.

3. An ingot mold having'a bottom opening and a sealing plate of largerarea than the bottom opening of the mold covering the same and supportedby the walls of the lower portion of the mold, and sealing materialpending applica applied beneath the plate on the mold walls near theedges of said plate.

l: An ingot mold having a bottom opening surrounded by a flattened ledgeand a sealing plate onto which the molten metal is poured oi larger areahen the bottom openiing covering the same and supported by said ed e.

5 An ingot mold having a circular bottom opening surrounded by a ledgeoi rectangular shape and a rectangular sealing plate oi" larger areathan the bottom opening coverlng the same and supported by said ledge.

6. An ingot mold having a bottom open ing surrounded by aplate-receiving recess and a sealing plate of larger area than saidopening and seated in said recess.

7. An ingot mold having a bottom opening surrounded by a plate receivingrecess, a plug mounted in said bottom opening, and a. seallng plate oflar er area than said opening and seated in sai recess 8. An ingot moldhaving a bottom opening surrounded by a plate-receiving recess,

sealing plate of larger area than the bottom Opening and supported insaid recess, and refractory sealing material interposed between thebottom of the plate and the bottom of said recess.

9. An ingot mold having a bottom opening, a sealing plug mountedtherein, a sealing plate of larger area than the bottom openingsupported on the mold Walls above said opening and above the plug, andrefractory material interposed between the plate and the plug.

10. An ingot mold having a necked-in lower portion formed With a bottomopening and With a plate receiving recess sura recessed portionsurrounding said bottom 20 opening and provided With a ledge and aseal.-

ing plate in said recess supported on said ledge.

In testimony whereof, I. have hereunto subscribed my name.

GEORGE A. DORNIN.

Witnesses:

RALPH C. SHARRETTB, J. RAYMOND HUGHES.

